And when Pharaoh saw that there was relief, his heart was hardened, and he did not hearken to them, as the Lord said.

Because there is no contradiction made on the part of those who are quick to do evil, therefore the heart of the children of men is fully determined in them to do evil.

And the Lord said to Moses, When you go and return to Egypt, see- all the miracles I have charged you with, you shall work before Pharaoh. And I will harden his heart, and he shall certainly not send away the people.

And the Lord said to Moses, The heart of Pharaoh is made hard, so that he should not let the people go.

but only [troubled him] in his affliction. And he departed yet again from the Lord, and King Ahaz said,

And he was not humbled before the Lord as his father Manasseh was humbled; for his son Amon abounded in transgression.

in that he rebelled against King Nebuchadnezzar, which he adjured him by God [not to do]; but he stiffened his neck, and hardened his heart, so as not to return to the Lord God of Israel.

Or do you despise the riches of His kindness, and forbearance, and longsuffering, not knowing that the kindness of God leads you to repentance?

But according to your hardness and impenitent heart you are storing up for yourself wrath in the day of wrath and revelation, and of the righteous judgment of God,